Traction-wheel.



/ E. A. JOHNSTON.

TRACTION WHEEL.

APPLICATION man FEB. 3. 1913.

Patnted May18,1915.

2 SHEETS-SHEET I.

E. A JOHNSTON.

TRACTION WHEEL.

APPLICATION FILED FEB. 3, mg.

Patented May 18,1915

2 SHEETS-SHEET 2.

s'ra

EDWARD A. JOHNSTON, OF CHICAGO, ILLINOIS, ASSIGNOR "IO INTERNATIONALHARVESTER CORPORATION, A CORPORATION OF NEW JERSEY.

TRACTION -WHEEL.

Specification of Letters Patent.

Patented May 18, 1915.

Application filed February 3, 1813. Serial No. 745,843.

To all whom it may concern:

Be it known that I, EDWARD A. JOHN- sron, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inTractionlVheels, of which the following is a full, clear, and exactspecification.

My invention relates to traction wheels.

It has for its object to increase the traction of a wheel.

A further object of my invention is to improve and simplify theconstruction of traction wheels by providing traction lugs thereon whichare readily attached thereto in a secure manner and at the same time arereadily removable therefrom when desired.

I attain this object by providing improved traction lugs carried uponthe rim or tire of the wheel in an improved manner.

In order to disclose my invention clearly and fully, I have illustratedtwo embodiments of the same in the accompanying drawings. It is to beunderstood, however, that the forms shown herein are susceptible ofmodification. I

Figure 1 is a side elevation of a wheel; Fig. 2 is a plan view of thetire thereof when removed from. the wheel; Fig. 3 is a longitudinalsectional view of a portion of the tire; Fig. 4 is a top plan view ofone of the traction lugs; Fig. 5 is a side elevation of a portion of oneof the same; Fig. 6 is a sectional view on the line 66 of Fig. 4; Fig. 7is a sectional view on line 77 of Fig. 4;; Fig. 8 is a sectional view online S-8 of Fig. 4; Fig. 9 is. a sectional view of a modified form oflug and attachment means therefor; Fig. 10 is a bottom plan view of theconstruction shown in Fig-9 Fig. 11 is a plan view of a further modifiedform of lug.

The construction shown, when broadly considered, comprises a tractionwheel I having a tire 2 carrying a plurality of traction lugs 3 ofimproved construction attached to said tire in an improved manner,hereinafter tire 2. This rim or tire 2 is preferably in the shape of awide metal band which is provided with means adapted to receive and ablyspaced apart farther from each other i so that the number of these slotsis less than that in the center series and that the several series ofslots cooperate to form a substantially zig-zag series of slotsextending around the tire 2. In the form shown in Figs. 2 and 3, theslots are similar-in outline and one end'of each of the same is enlargedand substantially circular in shape.

The lugs 3 are removably attached to tire 2 by means hereinafterdescribed. These lugs may assume different forms. In the constructionshown in Fig. i, the lug .isprovided with a longitudinally extendingarcshaped body portion 7 and laterally extending integral arms 8 and 9branching off from the body portion 7 in opposite directions atdifferent points in its length and at an angle thereto. As shown in thesections'ofthe lug the shown in Fig. 4., illustrated in Figs. 6, 7, andv I lug are provided with rearwardly'extending longitudinally reinforcedextensions 1211a!- ing raised portions 13 enabling them to pass, freelyover' the ends of the spokes 4 protruding above the outer surface of thetire 2.

As shown in Fig. 3, these lug members are each attached to the tire 2 bymeans of a plurality of countersunk rivets or other at-' taching means14 which extend" through openings or holes 15 in the same and pref-yerably have their outer ends protruded above the surface of the lug toincrease the traction efl'ect thereof. In the lug construction shown inFig. 4, one of these rivets is provided near the outer end of the arm 8,while another is provided at the junction of the arm with the bodyportion 7, a

similar arrangement being provided for arm 9. These rivets codperatewith the slots 6 in the tire 2 to removably attach the lugs to thelatter and for this purpose are provided with enlarged round inner endsor heads 16, adapted to pass through the rounded portions of the slots6, and connecting shanks 17 of reduced diameter, adapted to be movedlongitudinally in the elongated portions of the slots. this connectionthat due to the construcs tion of the lugs and the provision of exten--18 which protrude through the openings in the lug adapted to receivethe rivets 14, and

are fastened to the under surface of the tire by suitable nuts or othermeans 19. If desired, these bolts may extend through portions of certainslots 6 and be held securely to the tire by providing enlarged ends nthe same or suitable washers or the like. In a preferred form, however,the openings in the tire 2 adapted to receive the bolts 18 arepreferably made to accurately fit the bolts. Attention is furtherdirected to the fact that this holding or locking lug is positioned overthe joint between the ends of the tire 2 so that it acts as anadditional means for holding the ends of the same together.

In Figs. 9 and 10, Ihave shown a modified form of lug and attaching.means for the same. As shown in this construction, the lugs instead ofbeing provided with rivets 14 may be provided with integral downwardlyextending ears or lugs 20 provided with laterally extending lips 21. Ihave further illustrated in Fig. 11 a modified form of lug constructionwherein, instead of employing a lug of the construction shown in Fig. 4,I-provide the arms 8 and9 shown in that construction with fellow arms 22and 23 extending substantially at right angles thereto from the pointwhere the same branch off from the body portion. It is to be noted thatin this construction the number of rivets required is the same, and

that integral webs24 are provided extend- 'ing between the arms'tostrengthen the same. It is further to be noted that the lug presents alarger traction surface.

When it is desired to assemble a-wheel of the construction shown herein,it is only necessary for the assembler to slip the heads v 16 on the lugrivets through the enlarged or round portion of the slots 6, and thenslide the lugs forward so that the shanks 17 of these rivets .passintothe restricted portions It is to be noted in of the slots 6 to engagethe end wall of the same. In this position the lugs are located aboutthe periphery of the wheel and act to hold each other in position sinceno lug may be removed from the tire except by a move ment of theadjacent lug in the opposite direction to that used in attaching it tothe tire. Obviously, when the lugs have been so positioned about theperiphery of the tire,

the key lug is then bolted into place to lugs and at the same timeprovides means for securely positioning thelugs upon the tire of thewheel. Attention is further directed to the fact that, should any of thearms onthe lugs break, the connection of the series of lugs is not inany way interfered with, and that a break in the body portion of a luglikewise will not enable the lugs to fall because ofthe interlocking ofthe adjacent lugs. It is also to be noted that when for any reason it isdesired to remove alug it is only necessary to remove the key lugwhereupon all of the lugsat one side of the lug in question may bepushed backward by a Single movement to such a position as to permit theremoval of the same and after a new lug has been inserted, the same maybe immediately thrown forward and locked in position by the replacing ofthe key lug. Attention is also directed to the fact that in theconstruction shown herein, during the normal rotation of the wheel thelugs always occupy positions against the ends of the restricted portionsof the slots thus aflording an exceedingly rugged construction andpositive driving action.

While-I have described two forms of my invention in this application inorder .toclearly and fully describe thesame, it is to be understood thatthe embodiments thereof;

shown herein may be modified without departing from the spirit and scopeof the invention. v I f 1 What I claim as new and desire to secure byLetters Patent is:

1. In a traction wheel, a tire having elongated slots with lookingportions, a plural- 1ty of traction lugs having portions thereofprotruding through vsaid slots and normally engaging saidlocking'portions, and a lockity of traction lugs having portions movablelongitudinallyof said slots, and a key lug looking all of said lugs in apredetermined position. A

3. In a traction wheel, a tire, a plurality of spokes having their endsriveted to the outer surface of said tire, a plurality of lugs, eachprovided with means for removably attaching the same to said tire, and akey lug looking all of said lugs to said tire and itself connecting theends of said tire.

4. In a traction wheel, a tire, a plurality of spokes protruding throughthe outer surface of said tire, a plurality of lugs removably attachedto said tire and freelymovable over the extremities of said spokes, anda key lug looking all of said lugs in position upon said tire.

5. A traction lug comprising a longitudinally disposed body portionhaving a plurality of integral arms protruding angularly therefrom inopposite directions adjacent the opposite ends of the same, and meanscarried by the lug for removably attaching it to a support by shiftingsaid lug relative to the support.

6. A traction lug comprising an are shaped body portion having integrallaterally extending arms projecting angularly therefrom in oppositedirections, and a plurality of fastening means extendin through saidbody portion at the points 0 junction of said arms and through said armsat points between the. ends of the same, each of said fastening meansbeing provided with i111 enlarged head on the underside of said 7 In atraction wheel, a tire having a slot with a relatively large opening anda restricted portion extending from said large opening, and a lugremovably attached to said tire, said lug having a portion which ispassed through said relatively large opening and normally occupies saidrestricted locked to said rim to prevent -movement of.

the remaining lugs.

9. In a traction wheel, a tire having elongated openings with connectedenlarged and restricted portions, and a plurality of lugs removablyattached to said tire, said lugs having portions cooperating with saidopenings and being successively placed in the enlarged portions andmoved into the restricted portions of said slots'and secured againstradial movement thereby, adjacent lugs en-- gaging each other, the lastlug being locked to said rim to prevent movement of the remaining lugsthereon.

10. In a traction wheel, a tire having a slot with a relatively largeopening and a restricted portion extending from said large opening, twolugs removably attached to said tire, one of said lugs having a portionwhich is passed through said relatively large opening and normallyoccupies said restricted portion for effecting the attachment of saidlug to said tire, and locking means on the second lug cooperating withsaid tire for locking-said first lug to said tire.

Chicago, 111., Jan. 21, 1913..

In testimony whereof I aflix my signature,

in the presence of two witnesses. v

EDWARD A. Jo'HNsToN.

W'itnesses:

S. E. Hous'ron, A. L. CROOKS.

